1 files changed, 27 insertions, 0 deletions
diff --git a/test/CodeGen/X86/bswap.ll b/test/CodeGen/X86/bswap.ll
new file mode 100644
index 000000000000..592e25bae331
--- /dev/null
+++ b/test/CodeGen/X86/bswap.ll
@@ -0,0 +1,27 @@
+; bswap should be constant folded when it is passed a constant argument
+
+; RUN: llvm-as < %s | llc -march=x86 | \
+; RUN:   grep bswapl | count 3
+; RUN: llvm-as < %s | llc -march=x86 | grep rolw | count 1
+
+declare i16 @llvm.bswap.i16(i16)
+
+declare i32 @llvm.bswap.i32(i32)
+
+declare i64 @llvm.bswap.i64(i64)
+
+define i16 @W(i16 %A) {
+        %Z = call i16 @llvm.bswap.i16( i16 %A )         ; <i16> [#uses=1]
+        ret i16 %Z
+}
+
+define i32 @X(i32 %A) {
+        %Z = call i32 @llvm.bswap.i32( i32 %A )         ; <i32> [#uses=1]
+        ret i32 %Z
+}
+
+define i64 @Y(i64 %A) {
+        %Z = call i64 @llvm.bswap.i64( i64 %A )         ; <i64> [#uses=1]
+        ret i64 %Z
+}
+